/**
*      author: Y_Yao
*      created: 2025-01-04 20:11:51
**/

#include<bits/stdc++.h>

#define int LL
using namespace std;
using LL = long long;
const LL LLINF = 1e18;
const int INF = 0x3f3f3f3f;
int x;
int sum = 2025;

void solve()
{
    cin >> x;

    unordered_map<int,int> hash;
    for(int i = 1;i <= 9;i++)
    {
        for(int j = i;j <= 9;j++)
        {
            if(i != j) hash[i * j] += 2;
            else hash[i * j]++;
        }
    }

    if(hash.count(x))
    {
        cout << sum - (x * hash[x]) << endl;
        return;
    }
    cout << sum << endl;
}

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t = 1;
    //cin >> t;
    while(t--)
    {
        solve();
    }
    return 0;
}